NXP Semiconductors AN10907, Примечание к применению

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AN10907 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved.
Application note Rev. 1 — 28 December 2010 80 of 82
NXP Semiconductors
AN10907
TEA1613T resonant power supply control IC
15. Tables
Table 1. Pinning overview . . . . . . . . . . . . . . . . . . . . . . . .6
Table 2. TEA1613T driver specifications . . . . . . . . . . . .27 Table 3. Overview of protection functions with links . . . 59
Table 4. Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 78
16. Figures
Fig 1. Basic application diagram TEA1613T . . . . . . . . . .9
Fig 2. TEA1613T with application block diagram
(part 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Fig 3. TEA1613T with application block diagram
(part 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Fig 4. Basic overview internal IC supplies . . . . . . . . . . .12
Fig 5. Block diagram: SUPIC and SUPREG start-up
with SUPHV and auxiliary supply. . . . . . . . . . . . .14
Fig 6. Auxiliary winding on primary side (left) and
secondary side (right) . . . . . . . . . . . . . . . . . . . . .15
Fig 7. Position the auxiliary winding for good output
coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Fig 8. Typical SUPREG voltage characteristics
for load and temperature . . . . . . . . . . . . . . . . . . .18
Fig 9. Block diagram of internal SUPREG regulator . . .19
Fig 10. Simplified model of MOSFET drive . . . . . . . . . . .19
Fig 11. Typical application of SUPHS . . . . . . . . . . . . . . .21
Fig 12. GATELS and GATEHS drivers. . . . . . . . . . . . . . .25
Fig 13. Examples of gate circuits . . . . . . . . . . . . . . . . . .26
Fig 14. Simplified model of a MOSFET drive. . . . . . . . . .27
Fig 15. SNSBOOST function . . . . . . . . . . . . . . . . . . . . . .28
Fig 16. Inductive mode HBC switching . . . . . . . . . . . . . .30
Fig 17. Adaptive non-overlap switching during
normal operating conditions. . . . . . . . . . . . . . . . .31
Fig 18. Capacitive mode HBC switching . . . . . . . . . . . . .32
Fig 19. Capacitive/inductive HBC operating
frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Fig 20. Typical protection and regulation behavior in
capacitive mode (during bad start-up) . . . . . . . . .33
Fig 21. Frequency relationships. . . . . . . . . . . . . . . . . . . .34
Fig 22. Timing overview of the oscillator and
HBC drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Fig 23. Typical basic SNSFB application . . . . . . . . . . . . .37
Fig 24. SNSFB V-I characteristics . . . . . . . . . . . . . . . . . .38
Fig 25. SNSFB voltage to output power characteristics
examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Fig 26. SSHBC/EN: overview of sources, clamps and
levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Fig 27. Operating frequencies related to SSHBC/EN
voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Fig 28. OverCurrent Regulation (OCR) during
start-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Fig 29. Soft-start reset and two-speed soft-start . . . . . . .43
Fig 30. OCP and regulation HBC. . . . . . . . . . . . . . . . . . .44
Fig 31. SNSCURHBC: resonant current
measurement configurations . . . . . . . . . . . . . . . .46
Fig 32. Principle of burst mode operation with
SNSFB and comparator levels. . . . . . . . . . . . . . .47
Fig 33. Burst mode application . . . . . . . . . . . . . . . . . . . .48
Fig 34. Improved efficiency by HBC burst mode in
a 250 W converter. . . . . . . . . . . . . . . . . . . . . . . . 49
Fig 35. Reduced losses by HBC burst mode in
a 250 W converter. . . . . . . . . . . . . . . . . . . . . . . . 49
Fig 36. Increased efficiency at low output power in
burst HBC and PFC (90 W adapter) . . . . . . . . . . 50
Fig 37. Remaining 90 W adapter losses in burst
mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Fig 38. Simultaneous HBC and PFC burst mode
operation (and output voltage ripple) . . . . . . . . . 51
Fig 39. Designing the burst mode level using
two resistor values . . . . . . . . . . . . . . . . . . . . . . . 51
Fig 40. Compensation current on SNSBURST . . . . . . . . 52
Fig 41. Designing the burst mode level using a series
resistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Fig 42. Typical SNSFB voltage-to-output power
characteristic of a converter without burst mode
functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Fig 43. Example of SNSFB and frequency as functions
of output power characteristics (normal mode)
adapted for easy implementation of burst
mode comparator level detection . . . . . . . . . . . . 55
Fig 44. Transformer construction . . . . . . . . . . . . . . . . . . 56
Fig 45. SNSOUT protection . . . . . . . . . . . . . . . . . . . . . . 60
Fig 46. Example of disabling the UVP function of
SNSOUT/PFCON . . . . . . . . . . . . . . . . . . . . . . . . 62
Fig 47. Example of disabling the OVP function of
SNSOUT/PFCON . . . . . . . . . . . . . . . . . . . . . . . . 63
Fig 48. Example of disabling both the UVP and the
OVP functions of SNSOUT/PFCON . . . . . . . . . . 63
Fig 49. Block diagram of the RCPROT function . . . . . . . 64
Fig 50. RCPROT protection timer operation . . . . . . . . . . 64
Fig 51. RCPROT operating as a restart timer . . . . . . . . . 65
Fig 52. Ground structure and current loops in
an application with PFC . . . . . . . . . . . . . . . . . . . 67
Fig 53. Ground layout example with star point
at the boost capacitor . . . . . . . . . . . . . . . . . . . . . 68
Fig 54. PCB layout connecting SGND, PGND, CFMIN,
RFMAX and SNSCURHBC. . . . . . . . . . . . . . . . . 69
Fig 55. Start-up and debugging step-by-step . . . . . . . . . 71
Fig 56. Typical signals during a separate HBC
start-up for an increase in V
boost
. . . . . . . . . . . . . 72
Fig 57. Example of a basic IC test setup on a single
low voltage supply (24 V) . . . . . . . . . . . . . . . . . . 73
Fig 58. Example of a 250 W LCD-TV application
(part 1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Fig 59. Example of a 250 W LCD-TV application
(part 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Fig 60. Example of a 250 W LCD-TV application
(part 3). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76